Radio alarm clock



FIG. 1 is a front view of a "radio alarm clock" showing my design;

FIG. 2 is a back view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom view thereof.

The broken line showing on FIG. 2 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design of a radio alarm clock, as shown and described. 